A.–0.010m B.–0.007m C.+0.005m D.+0.007m
A.356°31′12″;28.172m B.266°31′12″;28.172m C.176°31′12″;28.172m D.86°31′12″;28.172m
A.右轉(zhuǎn)30°42′ B.右轉(zhuǎn)60°42′ C.左轉(zhuǎn)60°42′ D.左轉(zhuǎn)30°42′